Composition for reconditioning wood, abrased spike holes in rail sleepers, or for filling other holes and for similar purposes



Patented Feb. 20, 1934 UNITED STATES PATENT OFFICE O M P O S I T I O N FOR RECONDITIONING WOOD, ABRASED SFPIKE HOLES IN RAIL SLEEPERS, OR FOR FILLING OTHER HOLES AND FOR SIMILAR PURPOSES Sri Krishna, Dehra Dun, United Provinces, British India No Drawing. Application September 7, 1932, Serial No. 631,996, and in India September 7, 1931 4 Claims. (01. 1068) This invention has reference to compositions of of purposes. In another case coal tar, anthrathe kind comprising asphaltic or bituminous subcene, bitumen, petroleum residue and rubber have stances; resinous material as caoutchouc, waste been used after partial or complete vulcanizarubber or synthetic resinates, and rosin or rosintion. Yet in another process a fatty oil has been 5 ates, rendered fit by sulphurization and vuleanhardened by heating with metallic oxides and 60 ization, for use in very hot or very cold climates. the rubber like product thus formed has been This invention also relates to a process of makincorporated in bitumen. It is also known that ing the compound which is primarily adapted to rosin has been used in preparation of Said C0111- be used for reconditioning abrased spike holes in positions, and sulphur with the intention of railway sleepers, but which is also useful for fillhardening or vulcanizing the compositions. But 65 mg cracks in concrete roofs, etc. in none of the above processes have the use of According to this invention the composition asphalt, rubber, fatty oils, rosin, sulphur and when melted is capable of being poured into holes vulcanization been made in the manner to be or cracks in wood for which it has a strong bonddetailed later. And all the inventions quoted ing property; the composition to this end being above relate to processes of making compositions 7 constituted by mixing and heating together suitwhich are primarily adopted to be used as road able proportions of asphalt (natural or prepared) paving materials.

or bitumen; and caoutchouc or waste rubber or This invention consists of a process of mixing,

synthetic resinates in suitable solvent media such heating together, sulphurizing and vulcanizing 2 as castor oil, linseed oil or other organic solvents; with sulphur suitable proportions of asphalt or 7 and resins such as colophony, sulphuriaing and bitumen, rubber dissolved in castor oil; and colovuloanizing the mixture to proper consistency and phony, at suitable temperature.

hardness. The solid mass thus obtained is suit- The proportion by weight of the ingredients is able for use in filling cavities in wood which may preferably as followsz have been caused by natural decay, by wear and Parts tear, or by other causes. The composition is also Asphalt (natural, mpt. 90-103 C.) 50-57 capable of bonding together pieces of metals with Rosin (colophony, commercial) 7-12 wood and is suitable for use in fixing metal spikes Rubber (waste rubber) 15-11 or wooden plugs in holes in wood or concrete, thus Castor oil (commercial, crude) 15-11 4 obviating the necessity of boring fresh holes in Sulphur (commercial) 13-9 5,,

previously used timber, the composition serving as a filling, binding and preserving agent.

This invention includes a composition of mattor for the purposes explained in which asphalt is mixed with resinous materials and then vulcanized. The said composition is solid at ordinary temperature and melts on heating and thus 0 is Capable of being poured, but will set hard on After each addition of sulphur the mixture i -1 a froths up considerably and the next portion of giggiiiggf ham Such hlgh tem the sulphur is added only after the froth has This invention includes also the manner of subsiflei Whole Operation is performed in compounding and applying a composition of about 50 mlnutes. 13 parts of waste rubber, such tar, which Consists in mixing and heating and as old tubes from motor vehicles, dissolved in 13 vulcanizing the ingredients referred to in prcporparts sastm' D11 and kept hat at 15 then tions which will set solid when cool and can be pourw 1n the above Vulcanized esrheliic mixture rendered plastic or liquid by suitable increase in and incorporated by thorough To this temperature mixture is now added 6 parts of powdered sulphur The use of rubber in additign to various in small portions as before, temperature being tuminous substances for preparation of compomaintained at 260270 C.; an the Operation sitions similar to the above is well known. In taking about an hour- The mixture is t n 5 accordance with a known process a 5-10 per t lowed to remain at 276 C. for another 10 minutes solution is prepared of caoutchouc in benzene, before it is poured in 0100118 110 0 The b st petrol or carbon tetrachlorethane (CHClz-CHClz) results are obtained when the po o a and the said solution being mixed with bitumen a fusion point of -95 C. (Ball and Ring 55 and the mixture thus obtained is used for variety method).

The above are to be compounded as follows:- 53 parts of asphalt is melted along with 10 parts of rosin and the temperature of the mixture is slowly raised to 240-250 C. and 5 parts of powdered sulphur is added in small portions at Q? a time; temperature being maintained at 250 C.

The asphalt or bitumen serves to give the body; rosin the fluidity and the quick setting property, and resinous materials the necessary tenacity and elasticity. Sulphur is added to vulcanize asphalt, rubber and the oil with the intention of imparting to the mixture the requisite amount of hardness. For application, the blocks can be broken into small lumps, melted to a thin liquid on fire, and poured into the cavities or holes and after allowing it to shrink on slight cooling the spike, wooden plug and the like kept hot in the molten composition, is pushed in by gentle hammering, the composition thus spreading inside into all cracks and crevices and the composition in the set condition gripping and tightly adhereing to both the metal and the wood.

This invention thus comprises a composition of matter admirably suited for reconditioning wooden sleepers and the like purposes, where strong adhesion or an attachment of metal to wood, metal to stone or concrete, wood to wood, or stone to stone is desired. It can, therefore, be used for stopping leaks in concrete or metallic roofs of houses and for like purposes. Also for the purposes of making elastic and preservative cushion for interposing between wooden sleeper and the metal plate on which the rails rest.

From the foregoing it is obvious that the in vention is particularly serviceable in reconditioning wooden or concrete sleepers, the reconditioning being found necessary due to natural decay, wear, tear, splitting or due to spike killing. Spikes embedded in the composition referred to will hold tightly comparable to that afforded by the original sleeper substance. The composition is also capable of being used in fixing metal in horn, ivory or wood such as fixing loose knives in their handles or sockets, etc., and also being used as a water tightening material as, for example, stopping holes or cracks in concrete or metallic roofs or buildings, etc.

I claim:--

1. A process of manufacturing a composition of matter for reconditioning wood, abrased spike holes in rail sleepers and for other similar purposes, according to which from 50 to 5'7 parts of asphalt are first mixed with 7 to 12 parts of rosin at a temperature of 240 to 250 0., secondly, approximately five parts of powdered sulphur are gradually added to this mixture, thirdly, a solution of rubber in a fatty oil, such as castor oil, is added to the sulphurized mixture of asphalt and rosin, and the mixture finally vulcanized by heating with sulphur.

2. A process as claimed in claim 1, characterized in that whilst the powdered sulphur is being added to the mixture of asphalt and rosin the temperature is maintained to approximately 250 C.

3. A process according to claim 1, in which the final vulcanization is secured by adding approximately six parts of sulphur to the mixture which is then heated to a temperature of 260 to 270 C.

4. A vulcanized composition of matter for re conditioning wood, abrased spike holes in rail sleepers and for other similar purposes, comprising the following proportions of materials:

Parts Asphalt (natural, mpt. 90-l03 C.) 50-57 Rosin (colophony, commercial) 7-12 Rubber (waste rubber) 15-11 Castor oil (commercial, crude) 15-11 Sulphur (commercial) 13-9 SRI KRISHNA. 

